<!DOCTYPE html>
<html>
    <head></head>
    <body>
        <form action="/user_submit?name=guest&age=10" method="post" enctype="multipart/form-data">
            name:<input type="text" name="name" value="icexmoon"/><br/>
            age:<input type="text" name="age" value="12"/></br>
            <input type="submit" value="submit"/>
        </form>
    </body>
</html>